TY - BOOK AU - Jekel james f AU - Joann G eLMORE, David l. Katz TI - Epidemiology Biostatistics and preventive medicine: Saunders Text and review series SN - 0721652581 AV - ra652 .j45 1996 PY - 1996/// CY - Philadelphia PB - Wb saunders company KW - Preventive medicine N1 - includes appendix and index ER -